Aarons Edward S. Boeken

Gunnar Black Wolf, son of a Viking lord and a Moorish slave, grows up as one of the chosen of Odin and the companion of prince Harald Finehair. He returns home from fun and free-booting to find his adoptive parents, wife, and child dead, and vows vengeance against their slayer. In the course of this quest, he becomes outlawed and is driven to lead a mighty raid against the Franks.